Read it through once

The most devoted fisherman must have a bite at least as often as once a week or his passion will cool and he will put up his tackle. The tiger-sportsman must find a tiger at least once a fortnight or he will get tired and quit. The elephant-hunter's enthusiasm will waste away little by little, and his zeal will perish at last if he plod around a month without finding a member of that noble family to assassinate.